<template>
	<div class="error-container">
		<div class="error-content">
			<el-row :gutter="20">
				<el-col :xs="24" :sm="24" :md="12" :lg="12" :xl="12">
					<div class="pic-error">
						<img alt="401" class="pic-error-parent" src="@/assets/error_images/404.png" />
						<img alt="401" class="pic-error-child left" src="@/assets/error_images/cloud.png" />
						<img alt="401" class="pic-error-child" src="@/assets/error_images/cloud.png" />
						<img alt="401" class="pic-error-child" src="@/assets/error_images/cloud.png" />
					</div>
				</el-col>

				<el-col :xs="24" :sm="24" :md="12" :lg="12" :xl="12">
					<div class="bullshit">
						<div class="bullshit-oops">{{ oops }}</div>
						<div class="bullshit-headline">{{ headline }}</div>
						<div class="bullshit-info">{{ info }}</div>
						<a class="bullshit-return-home" href="#/welcome">{{ jumpTime }}s&nbsp;{{ btn }}</a>
					</div>
				</el-col>
			</el-row>
		</div>
	</div>
</template>

<script>
export default {
	name: "Page404",
	data() {
		return {
			jumpTime: 5,
			oops: "抱歉!",
			headline: "当前页面不存在...",
			info: "请检查您输入的网址是否正确，或点击下面的按钮返回首页。",
			btn: "返回首页",
			timer: 0
		}
	},
	mounted() {
		this.timeChange()
	},
	beforeDestroy() {
		clearInterval(this.timer)
	},
	methods: {
		timeChange() {
			this.timer = setInterval(() => {
				if (this.jumpTime) {
					this.jumpTime--
				} else {
					this.$router.push({ path: "/welcome" })
					clearInterval(this.timer)
				}
			}, 1000)
		}
	}
}
</script>

<style lang="scss" scoped>
$base-color-blue: #1890ff;
$base-color-gray: rgba(0, 0, 0, 0.65);
.error-container {
	position: absolute;
	top: 40%;
	left: 50%;
	transform: translate(-50%, -50%);

	.error-content {
		.pic-error {
			position: relative;
			float: left;
			width: 120%;
			overflow: hidden;

			&-parent {
				width: 100%;
			}

			&-child {
				position: absolute;

				&.left {
					top: 17px;
					left: 220px;
					width: 80px;
					opacity: 0;
					animation-name: cloudLeft;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-delay: 1s;
					animation-fill-mode: forwards;
				}

				&.mid {
					top: 10px;
					left: 420px;
					width: 46px;
					opacity: 0;
					animation-name: cloudMid;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-delay: 1.2s;
					animation-fill-mode: forwards;
				}

				&.right {
					top: 100px;
					left: 500px;
					width: 62px;
					opacity: 0;
					animation-name: cloudRight;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-delay: 1s;
					animation-fill-mode: forwards;
				}

				@keyframes cloudLeft {
					0% {
						top: 17px;
						left: 220px;
						opacity: 0;
					}

					20% {
						top: 33px;
						left: 188px;
						opacity: 1;
					}

					80% {
						top: 81px;
						left: 92px;
						opacity: 1;
					}

					100% {
						top: 97px;
						left: 60px;
						opacity: 0;
					}
				}

				@keyframes cloudMid {
					0% {
						top: 10px;
						left: 420px;
						opacity: 0;
					}

					20% {
						top: 40px;
						left: 360px;
						opacity: 1;
					}

					70% {
						top: 130px;
						left: 180px;
						opacity: 1;
					}

					100% {
						top: 160px;
						left: 120px;
						opacity: 0;
					}
				}

				@keyframes cloudRight {
					0% {
						top: 100px;
						left: 500px;
						opacity: 0;
					}

					20% {
						top: 120px;
						left: 460px;
						opacity: 1;
					}

					80% {
						top: 180px;
						left: 340px;
						opacity: 1;
					}

					100% {
						top: 200px;
						left: 300px;
						opacity: 0;
					}
				}
			}
		}

		.bullshit {
			position: relative;
			float: left;
			width: 300px;
			padding: 30px 0;
			overflow: hidden;

			&-oops {
				margin-bottom: 20px;
				font-size: 32px;
				font-weight: bold;
				line-height: 40px;
				color: $base-color-blue;
				opacity: 0;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-fill-mode: forwards;
			}

			&-headline {
				margin-bottom: 10px;
				font-size: 20px;
				font-weight: bold;
				line-height: 24px;
				color: #222;
				opacity: 0;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.1s;
				animation-fill-mode: forwards;
			}

			&-info {
				margin-bottom: 30px;
				font-size: 13px;
				line-height: 21px;
				color: $base-color-gray;
				opacity: 0;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.2s;
				animation-fill-mode: forwards;
			}

			&-return-home {
				display: block;
				float: left;
				width: 110px;
				height: 36px;
				font-size: 14px;
				line-height: 36px;
				color: #fff;
				text-align: center;
				cursor: pointer;
				background: $base-color-blue;
				border-radius: 100px;
				opacity: 0;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.3s;
				animation-fill-mode: forwards;
			}

			@keyframes slideUp {
				0% {
					opacity: 0;
					transform: translateY(60px);
				}

				100% {
					opacity: 1;
					transform: translateY(0);
				}
			}
		}
	}
}
</style>
